# 読書メモ vs OneStamp

The clearest difference is in-app purchases: OneStamp at none against 読書メモ's 1. OneStamp also leads on update cadence (every 6 weeks vs every 3 months). 読書メモ's advantage is review sentiment (53% vs 25%) and iOS requirement (12.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. 読書メモ sells 1 one-off in-app purchase. OneStamp asks for nothing beyond the download.

読書メモ ships an update every 3 months, OneStamp every 6 weeks. The most recent releases landed on November 1, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | 読書メモ | OneStamp |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **52.6% of reviews** | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | — | Free |
| Size | 1 MB | 9 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [enaksoft.com](https://appshunter.io/developer/521038978) | [Moocom Corp.](https://appshunter.io/developer/1125791678) |

## What reviewers say

### 読書メモ

[App page](https://appshunter.io/ios/app/id541494849)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| データ追加の回数制限解除 | $1.99 | one-time |


### OneStamp

[App page](https://appshunter.io/ios/app/onestamp/id1125791679)

Participate in multiple stamp rallies with a single app, eliminating the need for paper or individual apps. Check in at stamp points, link photos to create a personal photo album, and discover new rallies. Notifications alert you when stamp points are nearby.

**Highlights:** Manage multiple stamp rallies in one app, Search for nearby rallies and stamp points, Receive notifications for nearby stamp points, Link photos and notes to check-ins, Discover various themed stamp rallies

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 読書メモ free?

読書メモ is free to download, with in-app purchases available.

### Is OneStamp free?

OneStamp is free to download, with no in-app purchases.

### Do 読書メモ or OneStamp have ads?

Neither 読書メモ nor OneStamp shows ads.

### Which is updated more often, 読書メモ or OneStamp?

読書メモ ships an update every 3 months, and OneStamp every 6 weeks. Most recently, 読書メモ was updated on November 1, 2026 and OneStamp on November 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*